Rod-packing.



Patented lan. 28, I902. T. H. BUTLER &. 0. HAMMOND.

BOD PACKING.

(Application filed Apr. 26, 1901.)

(No Model.)

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' Attorney- NITED STATES PATENT OFFICE.

THOMAS H. BUTLER AND ORMON D HAMMOND, OF BALTIMORE, MARYLAND.

ROD-PACKING.

SPECIFICATION forming part of Letters Patent No. 691,893, dated January 28, 1902. Application filed April 26, 1901. Serial No. 57,551. (No model.)

To aZZ whom it may concern:

Be it known that we, THOMAS H. BUTLER and ORMOND HAMMOND,oitizens of the United States,residing at Baltimore city, in the State of Maryland, have invented certain new and useful Improvements in Rod-Packing; and we dohereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to rod-packing; and it consists in the novel construction and combination of the parts hereinafter fully described and claimed.

In the drawings, Figure l is a side view of a portion of an ammonia-gas compressor such as used in ice and refrigerating machines, showing this invention applied to its pistonrod. Fig. 2 is a longitudinal section through the packing devices drawn to a larger scale. Fig. 3 is a cross-section taken on the line or in Fig. 2.

A is a portion of the pump-cylinder of an ammonia-gas compressor, and B is its pistonrod.

.0 is a cover which closes one end of the cylinder A and which is secured to the cylinder in any approved manner. A stuffingbox a is formed on the cover 0, and c is packing material in the stuffing-box o,which encircles the piston-rod.

is an oil-supply chamber in the cover C around the stuffing-box c. This oil-supply chamber is provided with an inlet-pipe d and an outlet-pipe d, by means of which it is supplied with fresh and clean oil or any other equivalent lubricating fluid.

E is a screw-threaded guide on the front end of the cover 0, concentric with the stuffingbox 0.

F is a plunger which is slidable in the guide E. A stuffing-boxfis formed within the guide E around the plunger F, and f is packing material in the stuffing-boxf.

G is a follower formed on the rear end of the plunger F and sliding in the stufiing-box a. An annular oil-chamber g is formed in the plunger F around the piston-rod, and g are holes which connect the annular chamber 9 with the oil-chamber D.

H is a follower which slides in the stuffingbox f upon the plunger F, and h is a screwthreaded gland which engages with the screwthreaded portion of the guide E and which tightens up the packing material f. This gland also slides the plunger longitudinally in its guide,and thereby tightens the packing in the stuffing-box c. The gland his adjusted and locked in any approved manner,and it is preferably provided with a worm-wheel I on its'periphery. A worm dis journaled in suitable bearings in a stationary frame or support e, and is provided with ahandle 2" for revolving it. The worm gears into the worm-wheel and provides a means for adjusting the gland and forlocking it,so that it cannot slip after it has been adjusted.

J is a stuffing-box formed in the front end of the plunger F around the piston-rod, and j is packing material in the stuffing-box J.

, K is a follower which slides in the stuffingbox J, and k is a screw-threaded gland which engages with a screw-threaded portion Zr on the stuffing-box J and enables the position of the follower J to be adjusted. The gland It may be adjusted and locked by any approved means; but a worm and worm-wheel similar to those used for the gland h are preferred.

the worm which gears into it, and m is the handle on the worm-shaft for revolving it.

N is an oil-receiver supported below the said stuffing boxes, so that it can catch all the oil which passes outwardly through them. A strainer n is provided at the top of the receiver N. The pipe d is connected with the receiver N and is provided with a stop-valve n, so that the oil in the supply-chamber D can be emptied into the receiver when desired. The oil in the receiver N is pumped up andis used over again. The oil from the oil-chamber D keeps the piston-rod constantly lubricated and prevents any am monia-gas from passing out ofthe cylinder around the piston-rod. A portion of the oil is carried into the cylinder by the pistonrod at each outstroke and in this manner furnishes a constant supply of lubricating material to the piston and cylinder, so that no other means for lubricating the piston in the cylinder are required.

What we claim is- 1. The combination, with a cylinder-cover provided with a stuiiing-box, an oil-supply M is the worm-wheel on the gland 7s. m is chamber, and a guide arranged in front of the said oil-chamber and of greater diameter than the said stuffing-box; of 'a plunger slidable in the said guide and provided with an oil-chamber sliding within and constantly communicating with the aforesaid oil-supply chamber, said plunger having also a follower at its rear end for the said stuffing-box, and a stuffingbox at its front end; a rod which slides in the two said stuffing-boxes and the oil-chamber of the plunger; and means for keeping the said plunger oil-tight in its guide, substantially as set forth.

2. The combination, with a cylinder-cover provided with a stuffing-box, an oil-supply chamber, and a guide arranged in front of the said oil-chamber and of greater diameter than the said stufling-box; of a plunger slidable in the said guide and provided with an oil-chamber sliding within and constantly communicating with the aforesaid oil-supply chamber, said plunger having also a follower at its rear end for the said stuffing-box, and a stuffingbox at its front end; a stuffing-box around the said plunger in the said guide; a single means for adjusting the packing material in the last said stuffing-box and for moving the plunger longitudinally; and a rod which slides in the said stuffing-box of the cylinder-cover and in the stuffing-box and oil-chamber of the said plunger, substantially as set forth.

In testimony whereof we affix our signatures in presence of two witnesses.

THOMAS H. BUTLER. ORMOND HAMMOND. Witnesses:

W. N. FINLEY, A. G. HUNTER. 

